Triangle T(n,k) = prime(k) for k = 1..n.

Terms

a(0) =2a(1) =2a(2) =3a(3) =2a(4) =3a(5) =5a(6) =2a(7) =3a(8) =5a(9) =7a(10) =2a(11) =3a(12) =5a(13) =7a(14) =11a(15) =2a(16) =3a(17) =5a(18) =7a(19) =11a(20) =13a(21) =2a(22) =3a(23) =5a(24) =7a(25) =11a(26) =13a(27) =17a(28) =2a(29) =3